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# Elia Paini

Last seen: 6 días ago Active since 2021

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How to have this title graph?
Hi, I have to plot a graph displaying in the title two parameters each iteration, "cycle" and "minute", with the values after "=...

2 meses ago | 1 answer | 0

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Question

I need a function which returns 0 if the argument is negative
Hi, I need a function in Matlab which returns 0 if the argument is negative: f(x) = 0 if x < 0 f(x) = f(x) if x > 0 ...

2 meses ago | 1 answer | 0

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Question

How to switch to this graph? Mathematical question
Hi, I have a bit complicated question about a way to obtain a graph from a set of data. I have a code that return a solution o...

7 meses ago | 2 answers | 0

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Question

How to get this while cycle?
Hi, I'm trying to get a while cycle which checks convergence every iteration. Within the cycle, I'm solving a system which ret...

9 meses ago | 2 answers | 0

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Question

How can I do this iteration?
Hi, I have a simple question related to a problem. I have to make an iterative code which updates values of some hypothesized ...

11 meses ago | 1 answer | 0

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Question

How to solve this simple matricial system?
Hi, how can I solve this simple system in Matlab? A*u = h*G A: 4x4 u: unknowns vector, but it should be 4x1 h: scalar G...

11 meses ago | 2 answers | 0

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Question

How can I "simplify" the resolution of this system of odes?
Hi, as you can see in the attached file, I've a system of second order ODEs with BCs. I tried to solve it with bvp4c, firstly c...

alrededor de 1 año ago | 0 answers | 0

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Question

How to solve a system of ODEs with BCs, without bvp4c?
Hi, I solved a system of ODEs with BCs, by using bvp4c. The system is a bit complicated, consisting of 21 non linear equations,...

alrededor de 1 año ago | 0 answers | 0

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Question

How can I optimize initial guess of a solution?
Hi, I solved a system of non linear ODEs with bvp4c. The system is a bit complicated, since it contains 17 equations with 17 va...

alrededor de 1 año ago | 0 answers | 0

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Question

How can I solve this system of ODEs involving both time and space?
Hi, I have this complicated system of ODEs (see attached file), whose equations depend on time and space. I have no idea how ...

alrededor de 1 año ago | 1 answer | 0

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Question

How can I insert this boundary condition?
Hi everyone, I have an ODE system with several variables, like this: y1' = f (y1,y2) y2' = g (y1,y2) I'm solving it with...

alrededor de 1 año ago | 0 answers | 0

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Question

How to solve this ODE system which involves these integrals?
Hi, I'm trying to solve the following (simplified) ODE system (see attached file). Where X1 and X2 are my functions, z is the i...

alrededor de 1 año ago | 1 answer | 0

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Question

How can I improve accuracy using bvp4c?
Hi, I solved an ODEs system with BCs. The system is a bit complicated, it consists of 10 second order equations (thus, 20 first ...

alrededor de 1 año ago | 0 answers | 0

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Question

How to plot 3 graphs in 1 figure?
Hi, I want to plot 3 graphs in one figure, arranging them two on the left and one on the right. With subplot, I managed to arra...

alrededor de 1 año ago | 1 answer | 0

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Question

How should I get multiple solutions related to different BCs in this script?
Hi, I'm solving a system of ODEs with BCs, with bvp4c function. My simplified script is as follows: rmesh = ... ...

alrededor de 1 año ago | 0 answers | 0

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Question

What does it represent the second vector in solinit?
Hi, I solved a system of ODEs second order with BCs with bvp4c. I have 8 variables (4 are the functions I'm interested, y(x), ...

alrededor de 1 año ago | 0 answers | 0

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Question

Hi, I solved correctly a system of ODE second order with BCs, with the instruction bvp4c. However, I have some questions about ...

alrededor de 1 año ago | 1 answer | 0

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Question

Solving a system of ODE with BCs
Hi, I'm trying to solve a system of 2 ODE with boundary conditions. The integration variable is r, which is the sferical coord...

alrededor de 1 año ago | 1 answer | 0

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Question

Solving an ODE second order
Hi, I have to solve an ODE second order in Matlab, like this: a*y''(x)=b Where x is the space coordinate, a and b are costan...

alrededor de 1 año ago | 1 answer | 0